Standard hot-rolled round bars are delivered in diameters from 13 mm to 230 mm, and in many different sizes. They can be delivered at 1 mm intervals up to Ø 75 mm. Larger dimensions are available at 5 mm intervals.
Tolerances on dimensions and shape
The tolerances on dimensions and shape for round bars according to EN 10060 meet the European standards. Our rolling mills have excellent capability to produce tighter tolerances, including half the standard tolerance. Please contact our sales organisation when enquiring about and ordering hot-rolled bars if tighter tolerances are needed.
The most common bar length is 6 metres, but can also range between 3.5 and 18 metres, depending on the producing rolling mill. Heat treatments may restrict the maximum length.
If not otherwise specified, the manufacturing length is 6,000 mm. Bar diameter, heat treatment and yield optimisation may result in a deviation from this common length. Ten per cent of the bars may be below the minimum of the ordered range, but not less than 3 metres.
At the time of the order, bars can be delivered sawn to exact lengths.
Out of roundness is measured as the difference between the maximum and minimum diameters. Out of roundness is at most two-thirds of the diameter tolerance.
Straightness is measured as the maximum height of arch; in other words, the largest deviation from the straight line. Normally the test length is 1.0 metre. Normal straightness is a maximum of 2 mm/m.
Standard surface crack depth is max. 1% of the diameter. When an order is made the bars can be inspected, for example, by magnetic dispersion or the magnetic particle method. Normally, surface quality class D can be achieved for diameters up to Ø 80 mm and C for diameters up to Ø 120 mm that comply with EN 10221.